neutron gateway #5

Description

Neutron is a virtual network service for Openstack, and a part of
Netstack. Just like OpenStack Nova provides an API to dynamically
request and configure virtual servers, Neutron provides an API to
dynamically request and configure virtual networks. These networks
connect "interfaces" from other OpenStack services (e.g., virtual NICs
from Nova VMs). The Neutron API supports extensions to provide
advanced network capabilities (e.g., QoS, ACLs, network monitoring,
etc.)
.
This charm provides central Neutron networking services as part
of a Neutron based Openstack deployment

Multiple Floating Pools

If multiple floating pools are needed then an L3 agent (which corresponds to
a neutron-gateway for the sake of this charm) is needed for each one. Each
gateway needs to be deployed as a seperate service so that the external
network id can be set differently for each gateway e.g.

Instance MTU

When using Open vSwitch plugin with GRE tunnels default MTU of 1500 can cause
packet fragmentation due to GRE overhead. One solution is to increase the MTU on
physical hosts and network equipment. When this is not possible or practical the
charm's instance-mtu option can be used to reduce instance MTU via DHCP.

Note that there are only two 'name' values the charm knows about: 'requirements'
and 'neutron'. These repositories must correspond to these 'name' values.
Additionally, the requirements repository must be specified first and the
neutron repository must be specified last. All other repostories are installed
in the order in which they are specified.

The following is a full list of current tip repos (may not be up-to-date):

(boolean)
If True will enable Pacemaker to monitor the neutron-ha-monitor daemon
on every neutron-gateway unit, which detects neutron agents status and
reschedule resources hosting on failed agents, detects local errors and
release resources when network is unreachable or do neccessary recover
tasks. This feature targets to < Juno which doesn't natively support HA
in Neutron itself.

(string)
Optional configuration to support how the L3 agent option
handle_internal_only_routers is configured.
all => Set to be true everywhere
none => Set to be false everywhere
leader => Set to be true on one node (the leader) and false everywhere
else.
Use leader and none when configuring multiple floating pools

(int)
Configure DHCP services to provide MTU configuration to instances
within the cloud. This is useful in deployments where its not
possible to increase MTU on switches and physical servers to
accomodate the packet overhead of using GRE tunnels.

(string)
Space-delimited list of bridge:port mappings. Ports will be added to
their corresponding bridge. The bridges will allow usage of flat or
VLAN network types with Neutron and should match this defined in
bridge-mappings.

(string)
Space-delimited list of <physical_network>:<vlan_min>:<vlan_max> or
<physical_network> specifying physical_network names usable for VLAN
provider and tenant networks, as well as ranges of VLAN tags on each
available for allocation to tenant networks.

(string)
Space-delimited list of external ports to use for routing of instance
traffic to the external public network. Valid values are either MAC
addresses (in which case only MAC addresses for interfaces without an IP
address already assigned will be used), or interfaces (eth0)

(string)
Repository from which to install. May be one of the following:
distro (default), ppa:somecustom/ppa, a deb url sources entry,
or a supported Cloud Archive release pocket.
Supported Cloud Archive sources include:
cloud:<series>-<openstack-release>
cloud:<series>-<openstack-release>/updates
cloud:<series>-<openstack-release>/staging
cloud:<series>-<openstack-release>/proposed
For series=Precise we support cloud archives for openstack-release:
* icehouse
For series=Trusty we support cloud archives for openstack-release:
* juno
* kilo
* ...
NOTE: updating this setting to a source that is known to provide
a later version of OpenStack will trigger a software upgrade.
NOTE: when openstack-origin-git is specified, openstack specific
packages will be installed from source rather than from the
openstack-origin repository.

(string)
Specifies a YAML-formatted dictionary listing the git
repositories and branches from which to install OpenStack and
its dependencies.
Note that the installed config files will be determined based on
the OpenStack release of the openstack-origin option.
For more details see README.md.

(string)
Used by the nrpe-external-master subordinate charm.
A string that will be prepended to instance name to set the host name
in nagios. So for instance the hostname would be something like:
juju-myservice-0
If you're running multiple environments with the same services in them
this allows you to differentiate between them.